Solar garden light circuit.
Led solar lawn lamp driver ic.
This outdoor led solar garden lights project is a hobby circuit of an automatic garden light using a ldr and 6v 5w solar panel.
However when salvaging the solar cell and battery from a cheap solar garden light to make a charging circuit i realised the electronics are in fact a simple led driver.
To run a led from single 1 5 v 1 2v or in particular largely depleted batteries the famous joule thief circuit using a coiled toroid is great.
It offers the advantages of low power dissipation low minimum operating voltage and automatic dusk to dawn switching.
The yx8018 comes in a 4 pin transistor style to 94 package and the pin.
You can make your own solar light or single battery led booster driver.
When the daytime sunlight is irradiated on the solar cell the light energy is converted into electric energy and stored in the battery and then the battery is provided for the led light emitting diode of the lawn lamp at night.
It requires only an external inductor to construct a boost power supply with over 90 per cent efficiency.
Solar light ics are very handy they have the dark detection circuit and the voltage multiplying led driver built into one small four pin component.
Ic cl0116 lamp controller is an application specific integrated circuit asic in which solar charging and led driving sections are integrated on the chip.
Using the solar light ic all you need is the solar ic an inductor and the ultra bright led to make the circuit.
Add the battery and the solar cell and you have a solar light.
The solar lawn lamp mainly uses the energy of the solar cell to work.
During day time the internal rechargeable 6 volt sla battery receives charging current from the connected solar panel through polariy protection diode d9 and current limiting resistor r10.
So we can add to that circuit the simple joule thief voltage booster to get a good design for a solar garden light.
Inside the example i deconstructed was a single 1 25 volt 100 mah aaa nicd cell and a small pcb with the led a 220 uh inductor and a four pin voltage boosting integrated circuit marked yx8018.
Ana608 is the core component of all solar garden lights.
The complete circuit is shown in figure 2.
